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la <br />Alpha Analytical Laboratories Inc. e-mail: clientservices@alpha-labs.com <br />CHEMICAL EXAMINATION REPORT Page 24 of 68 <br />URS Corp - Sac <br />2870 Gateway Oaks Dr., Suite 300 Report Date: 10/22/07 07:24 <br />Sacramento, CA 95833 Project No: 18600251.02041 <br />Attn: Chani Leimbach Project ID: DTSC FMS24 Phase 2 <br />Order Number Receipt Date/Time Client Code Client PO/Reference <br />0770347 10/06/2007 13:00 URS -SAC <br />Metals by EPA 6000/7000 Series Methods - Quality Control <br />Batch AJ71541 - EPA 3051 Microwave <br />Blank (AJ71541-BLKI) <br />Prepared: 10/15/07 Analyzed: 10/18/07 <br />Antimony <br />Spike <br />Source <br />Arsenic <br />%REC <br />2.0 " <br />RPD <br />Analyte(s) <br />Result <br />PQL <br />Units <br />Level <br />Result <br />%REC <br />Limits <br />RPD <br />Limit Flag <br />Batch AJ71517 - Metals Digest <br />Matrix Spike Dup (AJ71517-MSDI) <br />Source: 07JO335-01 <br />Prepared: <br />I0/15/07 <br />Analyzed: <br />10/16/07 <br />Antimony <br />0.210 <br />0.020 <br />mg/l <br />0200 <br />ND <br />105 <br />70-130 <br />1.89 <br />20 <br />Arsenic <br />0.0201 <br />0.0020 <br />0.0200 <br />ND <br />95.0 <br />70-1.30 <br />1.00 <br />20 <br />Barium <br />0.229 <br />0.010 <br />0.200 <br />0.013 <br />108 <br />70-130 <br />2.59 <br />20 <br />Beryllium <br />0.199 <br />0.010 <br />0.200 <br />ND <br />99.5 <br />70-130 <br />2.97 <br />20 <br />Cadmium <br />0.204 <br />0.010 <br />0.200 <br />ND <br />102 <br />70-130 <br />2.90 <br />20 <br />Chromium <br />0.202 <br />0.050 <br />0.200 <br />ND <br />101 <br />70-130 <br />0.496 <br />20 <br />Cobalt <br />0.203 <br />0.020 <br />0.200 <br />ND <br />102 <br />70-130 <br />1.95 <br />20 <br />Copper <br />0.191 <br />0.10 <br />0.200 <br />ND <br />95.5 <br />70-130 <br />0.00 <br />20 <br />Lead <br />0.190 <br />0.050 <br />0.200 <br />ND <br />95.0 <br />70-130 <br />3.62 <br />20 <br />Molybdenum <br />0.211 <br />0.50 <br />0.200 <br />ND <br />106 <br />70-130 <br />0.943 <br />20 <br />Nickel <br />0.175 <br />0.10 <br />0.200 <br />ND <br />87.5 <br />70-130 <br />3.92 <br />20 <br />Selenium <br />0.0166 <br />0.0050 <br />0.0200 <br />ND <br />83.0 <br />25-136 <br />0.604 <br />20 <br />Silver <br />0.180 <br />0.010 <br />0.200 <br />ND <br />90.0 <br />70-130 <br />3.28 <br />20 <br />Thallium <br />0.207 <br />0.40 <br />0.200 <br />ND <br />104 <br />70-130 <br />0.484 <br />20 <br />Vanadium <br />0.196 <br />0.50 <br />0.200 <br />ND <br />95.0 <br />70-130 <br />1.54 <br />20 <br />Zinc <br />0.213 <br />0.10 <br />0.200 <br />ND <br />106 <br />70-130 <br />4.59 <br />20 <br />Batch AJ71541 - EPA 3051 Microwave <br />Blank (AJ71541-BLKI) <br />Prepared: 10/15/07 Analyzed: 10/18/07 <br />Antimony <br />ND <br />15 mg/kg <br />Arsenic <br />ND <br />2.0 " <br />Barium <br />ND <br />10 " <br />Beryllium <br />ND <br />0.75 " <br />Cadmium <br />ND <br />1.0 " <br />Chromium <br />ND <br />5.0 " <br />The results in this report apply to the samples analyzed in accordance with the chain <br />of custody document, This analytical report must he reproduced in its entirety. <br />Bruce Gove 10/22/2007 <br />Laboratory Director <br />Corporate: 208 Mason St., Ukiah, CA 95482 • Phone: (707) 468-0401 • Fax: (707) 468-5267 <br />Service Center: 6398 Dougherty Rd., Suite 3, Dublin, CA 94568 • Phone: (925) 828-6226 - Fax: (925) 828-6309 <br />